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SPAN (Standard Portfolio Analysis of Risk) is used by the exchanges to compute clearing member overall portfolio margin and is typically used by clearing members and brokers to compute individual account margin (although many brokers have their own non-SPAN margining systems). It's typically...

Typically scalping refers to short time frames (usually 1-15 minutes) and fractional gains/losses. All trading does not require scalping - a swing trader taking partial profits to reduce position risk is not scalping. Scalping is daytrading, but daytrading is not necessarily scalping...

You can get the end of month short interest numbers for Nasdaq issues from Nasdaq or Viwes online but if you want NYSE short interest for a stock you'll have to download their montly PDF file and look it up manually (but note that the list is in alphabetical order by company name rather than by...

Before this thread degenerates further into more uninformed religious zealotry - How about we just acknowledge that someone might have linux on their desktop (for whatever personal or business reason) and want to use it to trade from and then the discussion can stay focused on what choices a...

biomech - FWIW, I don't see that there's a "progression" from scalping to longer term tradng strategies. Any more than there's a progression from defensive tackle to downhill skier. The two involve different skill sets. You could "transition" from one to the other just as you could...

biomech - The old adage "Plan your trade and trade your plan" is the first step in controlling your emotions. Know exactly when and why you'll enter, when and why you'll exit if it doesn't go you're way, and when you'll take some profits off the table and how you'll manage the position...

quote: -------------------------------------------------------------------------------- Originally posted by arky If you intend to swing trade, either intraday or over one to five days, you better have a strong stomach. --arky...

hpydad - Run, don't walk, as fast as you can away from that thing. Those who've been on ET for a long time might remember this. We've been through this before on some other threads. These appear to be the same guys (and basically same junk) that was being hyped on the boards a year or...

OK, let's use 6 times equity then - What do you mean "fully hedged position"? - simply being long one stock for $300,000 and short another stock for $300,000 isn't a hedged position at all. You actually have UNhedged on both the long and short sides. Example: Long 10,000 shares of Stock A...

Babak - Why illiquid? As Magna noted, the SMH has good volume (3.6M average with days up to about 7M - already 3M today at noon ET) and decent spreads (about a nickel at the moment but have seen it up to 15 cents) and the bid/ask size is currently 5000 x 5000. It seems liquid enough -...

So are you saying that someone with $100K in equity can carry $820K in open posiition exposure overnight without a problem just because half of it is long and half of it is short?? They're not really offsetting exposures. Suppose they've got 10,000 shares of Stock A @ 40 long and 10,000...

A satlink isn't especially well suited for REAL realtime two-way computer-computer interaction, VoiceOverIP, etc. due to the 1/2 second or so bidirectional latency. But for a basically one-way data stream application it shouldn't be a big problem. You'll just have to recognize that the...

bluesky - The MMs can't see your stop orders. They just have a pretty good idea where a lot of people are probably placing them if they want to try to run them. Free websites and realtime alerts don't normally fit in the same sentence. Your broker might provide realtime alerts though...

If folks are up in arms over IB/def not being allowed to do support for IB on ET, can't IB just open their own thread/board on Yahoo, SI, or Raging Bull and just let everyone know what it is? Was the reason for def doing IB support here in the first place because IB's support group wasn't...

Not sure how much running the stops is done anymore with the diversity of execution routes other than MMs (sometimes see what looks like it could being done on the index futures though). But originally I believe the idea was to (for example) shake a bunch of people out of their long positions...

Tripack - don't have a URL handy, that's how I recall it was speced to work when I did some work at the CME a few years ago.

Just a thoght - The nuke detonated at Hiroshima had a yield of only 12.5 kilotons At that level, the pressure wave blast damage zone would be maybe a mile or so in radius with the most intense pressure (about 12 psi) out to about 1/4 mile or so radius from the blast point. Hanging the...

Tripack - you're correct that the only native Globex order is a limit order, but there is a front end that transforms market orders to limit orders based on CME parameters. The broker can do the transform (apparently what IB calls simulation) themselves of course if they choose to but the...

Something you want to be careful of though is which historical volatility you compare the implieds to for validation (e.g., whether they're really high or low). The 100 day HV is typically shown, but I've found that the 30 day HV is usually a better metric against which to compare IV.

Tripack - Where'd the .3% come from? Is this something IB does by itself? The Globex front-end should do the market order to limit order transform based on whatever guidelines the CME is currently using. Is IB getting in the middle and doing the transform themselves?